Where can I download Free 2D ST4? It was uninstalled to fix an issue a Win7 isn't supported at work

I have been running Free 2D ST4 for about 1.5 years. I recently had some computer issues where some files were corrupted which required me to uninstall SE 2D among other things. I see that only ST6 is available for download but it requires Windows7. I am still running Windows XP at my company. Is there a way I can get a copy of ST4 to re-install it on my computer at work?